Textile product



Patented Nov. 17 194 2 UNITED STATES PATENT OFFICE I 2.30am I TEXTILEPRODUCT mm a. Sitllet, Cumberland, rm, alaignor to.

Cclanese Corporation of America, a corporation of Delaware No Drawing.Application-April StrlalNO. 331,001

v s d 5' Claims. (Cl. eta-m) This invention relates to the knitting ofyarns and relates more particularlyato the knitting of yarns composed ofstapilized fibers.

An object of this invention is the improvement, of the knittingqualities of stapilized yarns.

Another object of this invention is to improve said knitting qualitiesso thatvgarments and' various other articles of apparel may be knitted.

These articles may be knitted in a singlesolid shade or, by varying thecolor of the yarn and the manner in which it is knitted into thearticle,

. a patterned effect may be achieved composed of two or more colors.Likewise, the stitch used in knitting the article or garment may also bevaried and an unlimited number of effects may be achieved.

Various kinds of yarns may be used in knitting, depending upon the typeof garment or .article being knitted and thepurpose for which it is tobe used. Among the most desirable yarns used for knitting are thosewhich are known as artificial silks. These synthetic yarns may beprepared by any one of a number of vdifierent processes and the yarns incommercial use today are identified as either viscose, cuprammon'ium,nitro-cellulose or cellulose acetate art silks, depending upon theprocess used for their manufacture. Besides the cellulose acetate, otherorganic derivatives of cellulose may be used for the production ofartificial yarn, such as cellulose ethers and cellulose esters. Althoughthese yarns find extensive commercial application when in continuousfilament form, they are particularly desirable and attractive forcertain special uses when the yarns are in stapilized form. By thisstapllizing process the continuous filamentary character of the 'yarn ischanged so that it resembles a yarn spun from staple iber.

This effect is achieved by severing different-filaments comprising theyarn at different places along their lengths by controllably cutting .orabrading the yarn. The resultingyarn is then composed of short lengthsof filaments, the length of filament being varied as desired during thesevering operation. This stapilized yarn, while refibers, is moredurable than the latter in that it retains the highly desirableserimetric properties oicontinuous filament yarn.

' Cloth having a very soft and full appearance may be woven from suchyarns but when it is desired to produce a knitted fabric from suchstapilized yarns serious difilculties are sometimes encountered. Sincethe yarn is composed of comparatively short lengths of filaments,individual filaments occasionally work loose and pro duce a substantialamount of lint and wild filaments. As a result the operation of theknitting machine is seriously hampered and assubstantial percentage ofarticles knitted must be discarded, being unsatisfactory because of theholes which are due to bursting out in knitting or the dropping ofstitches. Various attempts to overcome these difllculties have been madebut a rather substantial proportion of articles knitted were stillunacceptable commercially.

I have now discovered that continuous filament yarns which have beenstapllized may be sucsembling, in appearance, yarn spun from staple '55cessfully knitted on various commercial knitting machines if continuousfilament yarns having a denier per filament of less than about 2.0 areused for the production of the stapilized yarn.

Preferably I employ a continuous filament yarn having a denier perfilament of about 1.5. When.

using stapilized yarns produced from such continuous filament yarn,plain stitches, rib stitches, tuck stitches and a wide variety of othertypes .of stitches and patterns may be knitted therewith, the resultingknitted articles exhibiting a high degree of uniformity and freedom fromdefects (holes)-.'

The length of filament contained in-these stapilized yarns may be variedas desired by varying the adjustment of the stapilizing mech-' anlsm.Yarns in which the staple length varies from 3 inches to about 20 inchesare verysatisfactory, but I preferablyuse yarns in which the staplelength is from about 10 to about 11 inches.

Highly twisted stapilized yarns, as well as yarns having a low degreeoftwist. may be used for knitting. Yarns in which the number of turns perinchvaries from about 3 to about 15 are suitable, but I prefer to usethe low denier yarns which have about 5 turns per inch.

While these low denier per filament stapilined yarns knit satisfactorilyin the-absence of any lubricant, for some types of stitches the additionof about'i% to about 2.5% of a lubricant may be desired. Lubr cants suchas sulphonated olive oil mixed with sperm'oil and mineral oil aresuitable and the lubricant may be applied to the yarn by means of awick, for instance, or in any other'suitable manner at any stage in themanufacture of the yarn prior to knitting. Applicaresults. Also, theyarn may be dyed any suitable tion of lubricant at the metier yieldsexcellent shade prior to knitting or the article may be dyed after it isknitted. The present invention is applicable to lustrous yarns aswell asto lusterless yarns.

It is to be understood that the foregoing de-. tailed description ismerely given by way of illustration and that many variations may be madetherein without departing from the spirit.

of my invention.

Having described my invention, what! desire to secure by Letters Patentis:

1. Method of producing knitted fabric, which comprises knitting into afabric yarn prepared by stapilizing an artificial continuous filamentyarn in which the denier per' filament is substantially 1.5.

2. Method of producing knitted fabric, which comprises knitting. into afabric yarn prepared by stapilizing an artificial continuous filamentyarn in which the denier per filament is substantially 1.5, said yarnbeing lubricated prior to the knitting operation.

3. Method of producing knitted fabric, which comprises knitting'into afabric yarn prepared by stapilizing an artificial continuous filamentyarn in which the denier per filament is substan= tially 1.5, said yarncontaining from 1.5%"to 2.5% of a yarn lubricant. v 4. Method ofproducing knitted fabric, which comprises knitting into a fabric yarnprepared by stapilizing continuous filament yarn having a basis of anorganic derivative of cellulose and in which the denier per filament issubstantially 1.5.

5. Method of producing knitted fabric, which comprises knitting into afabric yarn prepared by stapilizing continuous filament yarn having abasis of cellulose acetate and in which the denier per filament issubstantially 1.5.

RICHARD R. srrzma.

